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Design and Development of a Thermoelectric
Beverage CoolerBy:
Brandon Carpenter Andrew Johnston
Tim TaylorFaculty Advisor:
Dr. Quamrul MazumderUniversity of Michigan - Flint
Objective
• Refrigerator designed for cooling large
multiple items• Inefficient if only a single item is to
be cooled• Due to size is non-portable• Technology requires coolant, compressor,
and cumbersome tubing
Objective
• Apply concept of refrigerator to a small
scale device• Solid-state, eliminate need for coolants• Portability; can be taken wherever needed• Concentrate cooling onto single object to
be cooled, eliminate energy waste in
cooling empty space
Engineering Approach
• Use Peltier thermo cooler to provide
cooling • Use tight fitting aluminum sleeve to
enhance conductivity• Machine base to match contour of
can bottom• Use fans with heat sink to remove heat• Power with drill battery
Preliminary Calculations
• Initial goal: to cool a can from 700F to 350F in approximately 5 minutes.
• Required Cooling Rate:q= ρ V c
q= (1000kg/m3)( 3.54(10-4)m3)( 4.189kJ/kg∙K)( .0533 K/second)
This gives a value for q of .079 kW, or 79 Watts.
Further Calculations
• Base: ΔT = 16K kAl = .58W/m•K A= .00383m2 dx= .0051m
• q = kA q= (.58)(.00383)(3137) q = 6.99W
• Sleeve: ΔT = 16K kAl = .58W/m•K
L = .108m r1= .0327m r2= .0349m
• q = 2πLk q= 2π(.108)(.58) = 95.4W [3]
• Total Cooling = 95.4W + 6.99W = 102.4W
Notes on Cooler
• While a cooler with a higher rated wattage
would theoretically be able to remove
more heat, it creates more heat due to
resistance and requires a much larger
heat sink.
• In order to remain portable a smaller
cooler was needed, affecting cooling time.
Main Components
• Sleeve6061 Aluminum
Cut to appropriate length
2.62” Inner Diameter
0.065” Wall
Thickness
Main Components
• Machined Base6061 Aluminum
Designed to accommodate various cans,
as dimensions can differ
Manufacturing / Assembly
• Aluminum tubing was cut into appropriate • lengths to make sections
1. Beverage Compartment
2. Fan Housing (which was not used)
3. Wiring Compartment
4. Battery Compartment
Manufacturing / Assembly
• Discs were made
to serve as plates
between sections
and for mounting
purposes
Manufacturing / Assembly• Insulation was placed
around beverage compartment
• Thermal paste was
applied between
thermo cooler,
heat sink, top disc,
base, and sleeve
Testing Procedure• A 12 oz. pop can is filled with water and placed in
the beverage compartment
• Initial temperature of the water is recorded
• Cooler is turned on, and temperature is recorded in two minute intervals
• Additionally, the ambient air temperature, starting battery voltage, and final battery voltage are recorded to check for any correlation
Testing Procedure• For each test, the data is entered into
an Excel spreadsheet
For comparison purposes, a similar test was conducted using a refrigerator
Cooling Module Test #1 Time (minutes) Temperature (⁰F) dT/dt (⁰F / min) Ambient Air: 65.5(⁰F)
0 82.2 Starting Voltage: 12.45V2 79.7 1.25 Final Voltage: 9.14V4 77.7 16 75.7 18 73.9 0.910 72.3 0.812 70.5 0.9
dT/dt min 0.8 dT/dt max 1.25 dT/dt ave 0.975
Discussion• Refrigerator – constant 0.317 F / min⁰• Cooler - maximum 0.65 F / min ⁰ - average 0.317 F / min⁰• In terms of the cooler outperformed the
refrigerator• Could only maintain this cooling level for
short period due to battery